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TSP
2010
12 years 11 months ago
Analog beamforming in MIMO communications with phase shift networks and online channel estimation
In multiple-input multiple-output (MIMO) systems, the use of many radio frequency (RF) and analog-to-digital converter (ADC) chains at the receiver is costly. Analog beamformers op...
Vijay Venkateswaran, Alle-Jan van der Veen
MOBICOM
2009
ACM
13 years 11 months ago
Dynamic spectrum access in DTV whitespaces: design rules, architecture and algorithms
In November 2008, the FCC ruled that the digital TV whitespaces be used for unlicensed access. This is an exciting development because DTV whitespaces are in the low frequency ran...
Supratim Deb, Vikram Srinivasan, Ritesh Maheshwari
ICC
2000
IEEE
151views Communications» more  ICC 2000»
13 years 9 months ago
Channel-Hopping Multiple Access
— The medium-access control (MAC) protocols for wireless networks proposed or implemented to date based on collision-avoidance handshakes between sender and receiver either requi...
Asimakis Tzamaloukas, J. J. Garcia-Luna-Aceves
TSP
2008
130views more  TSP 2008»
13 years 4 months ago
Differential UWB Communications With Digital Multicarrier Modulation
Abstract--As a high-rate alternative of impulse radio (IR) ultrawideband (UWB) communications, analog and digital multicarrier UWB radios with coherent detection have been introduc...
Huilin Xu, Liuqing Yang
VTC
2010
IEEE
233views Communications» more  VTC 2010»
13 years 3 months ago
Quantization and Transmission of the Energy Measures for Cooperative Spectrum Sensing
— We consider the sensing of the frequency spectrum based on energy detection for cognitive radios. It has been shown that the reliability of the sensing can be improved by using...
Olivier van den Biggelaar, Jean-Michel Dricot, Phi...